English verb conjugation MUST STRAIGHTEN

Regular verb: straighten - straightened - straightened

Affirmation

Simple form

I must straighten
you must straighten
she must straighten
we must straighten
you must straighten
they must straighten

V-ing form

I must be straightening
you must be straightening
she must be straightening
we must be straightening
you must be straightening
they must be straightening

Perfect

I must have straightened
you must have straightened
she must have straightened
we must have straightened
you must have straightened
they must have straightened

V-ing perfect

I must have been straightening
you must have been straightening
she must have been straightening
we must have been straightening
you must have been straightening
they must have been straightening

Negation

Simple form

I must not straighten
you must not straighten
she must not straighten
we must not straighten
you must not straighten
they must not straighten

V-ing form

I must not be straightening
you must not be straightening
she must not be straightening
we must not be straightening
you must not be straightening
they must not be straightening

Perfect

I must not have straightened
you must not have straightened
she must not have straightened
we must not have straightened
you must not have straightened
they must not have straightened

V-ing perfect

I must not have been straightening
you must not have been straightening
she must not have been straightening
we must not have been straightening
you must not have been straightening
they must not have been straightening

Interrogative form

Simple form

must I straighten?
must you straighten?
must she straighten?
must we straighten?
must you straighten?
must they straighten?

V-ing form

must I be straightening?
must you be straightening?
must she be straightening?
must we be straightening?
must you be straightening?
must they be straightening?

Perfect

must I have straightened?
must you have straightened?
must she have straightened?
must we have straightened?
must you have straightened?
must they have straightened?

V-ing perfect

must I have been straightening?
must you have been straightening?
must she have been straightening?
must we have been straightening?
must you have been straightening?
must they have been straightening?

Interro-negative form

Simple form

must I not straighten?
must you not straighten?
must she not straighten?
must we not straighten?
must you not straighten?
must they not straighten?

V-ing form

must I not be straightening?
must you not be straightening?
must she not be straightening?
must we not be straightening?
must you not be straightening?
must they not be straightening?

Perfect

must I not have straightened?
must you not have straightened?
must she not have straightened?
must we not have straightened?
must you not have straightened?
must they not have straightened?

V-ing perfect

must I not have been straightening?
must you not have been straightening?
must she not have been straightening?
must we not have been straightening?
must you not have been straightening?
must they not have been straightening?

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